I love the rimless glasses because they are the closest thing to invisible glasses, however, the high gloss polish on the edges really gives them away. I know you can get a satin polish instead of a high gloss, but in my opinion, this is almost as bad. If they can put the AR coating on the front and back of the lenses, then why can't they do the same with the edges since it's all the same material?
It depends on what kind of fire extinguisher you are using. There are three kinds, a Carbondioxide (CO2) extinguisher, water extinguisher, and Dry Chemical Extinguisher. You most likely have a CO2 extinguisher or a Dry Chem. If it was a CO2 then there is no cleaning necessary because the CO2 gas diffuses and is harmless. If it was a Dry Chem, meaning there was a residue left behind then make sure you clean it really well.
The only type of tire that will grip on sheer ice is a studded tire. Studs have the disadvantage that they make the tire very heavy. Homemade studded tires are even heavier. Studded tires with tungsten carbide studs don't wear down very quickly on pavement, but they do have less grip on dry pavement than a non studded tire. On snow, some mountain bike tires grip pretty well, however the needs of front and rear tires are very different. In the front you need a tread design that improves steering grip while in back you need traction to drive the bike forward. For snow, I use a front tire made to give good grip in slippery muddy conditions. It is a front specific tire. In back I use a tire that has large raised traction lugs that extend across the tread surface. Narrow tires work pretty well in snow as well if it is fresh. They cut through the snow to the road surface. But if the snow has been packed down by car traffic all bets are off. There are bikes designed for real heavy snow conditions. They have extra wide rims and tires that can float over soft snow. The Surley Pugsley has tires and wheels like that. These tires can run at very low pressure, around 10-15psi. On dry pavement, almost any type of tire will work, but you have to be on the lookout for ice patches
